Police say at around 3:00 p.m. Tuesday, an SUV that was traveling on northbound I-495 in Edgemoor at a high rate of speed, went over the guardrail and struck a southbound car.
An occupant in the southbound car was killed instantly.
He has been identified as 54-year-old Steven V. Carbone of Townsend.
The SUV then came to a rest overturned in the southbound lanes.
Two others involved in the accident were rushed to Christiana Hospital for non-life-threatening injuries.
The accident caused major traffic problems in the area.